[Python] How to erase segments where NaN values in a plot

I have a date column and other columns with some NaN values. I'd like to only have a plot for non-nan values, but there are segments between 2 non-nan values values (see image).

plt.figure()
plt.plot(merge_nal_cont["Date"], merge_nal_cont["GPP_DT_uStar"], label="daytime")
plt.plot(merge_nal_cont["Date"], merge_nal_cont["GPP_uStar_f"], label="nighttime")
plt.grid()
plt.legend()
plt.title("GPP à Nalohou")
plt.show()




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